fine tooth comb

F

fine-tooth comb (idiom)
/ˌfaɪn ˌtuθ ˈkoʊm/

Meaning

• Look through something so carefully that almost nothing can hide.
• Check every line, corner, or detail until you are sure you have not missed a thing.
• A comb whose teeth sit very close together, the kind used to pick tiny things out of hair.

Synonyms: scrutinize, examine thoroughly, inspect closely, comb through, pore over, scour, leave no stone unturned.

Example Sentences

1. Sarah went over the budget with a fine-tooth comb and found two charges nobody had noticed.
2. Mike’s boss told him to search the warehouse with a fine-tooth comb until the missing shipment turned up.
3. Lisa read the lease with a fine-tooth comb before she signed, just to be sure there were no surprises.
4. Mom sat with a fine-tooth comb and worked through the child’s hair strand by strand.

Etymology and Origin

A Comb Long Before It Was a Saying

The phrase did not start life as a clever remark about paperwork or police work. It started as a real comb. The teeth sit close together on purpose. That tight row is what lets it catch what a wider comb lets through, especially the tiny eggs that cling to hair. People have used combs like this for a very long time. Finds from ancient Egypt and the eastern Mediterranean still hold lice and nits between the teeth. English later borrowed that picture. The tool itself is much older than the idiom.

How the Words Came Together

The name is plain English. Fine describes the teeth. Comb is the object. Nothing in the original wording has to do with cleaning human teeth, though later speakers sometimes heard it that way. Print has used both fine-tooth comb and fine-toothed comb. The longer form came first as a simple description. The shorter one is the form most people write now. For a long stretch, neither version was an idiom. It was just what shopkeepers called a certain kind of comb, sold by the dozen in horn, ivory, and later hard rubber.

The First Time It Shows Up in Print

The earliest written use that can be pinned down with a date is American. On 12 January 1784, the New York merchant J. Beekman listed stock in a business letter later gathered in the Beekman Mercantile Papers:

“16 dozen long fine tooth combs.”

He is selling combs, not making a metaphor. The same practical sense holds for years after that.

In 1839, Howard Malcolm, in Travels in South-Eastern Asia, wrote that friends sending small gifts “might send fine-tooth combs.” In 1858, Lola Montez warned in The Arts of Beauty that combing children‘s hair too often with a fine tooth comb could scratch the scalp. The compound belongs to ordinary English trade and home life. The first known line happens to come from the United States.

When Searching Entered the Picture

Once you know what the comb does, the later meaning is almost obvious. Clearing nits is slow, close work. Every section of hair has to pass through teeth that leave little room to hide. By the mid-1800s, writers had begun to use that image for any search that was meant to miss almost nothing. In March 1852 the Bangor Daily Whig and Courier already treats the comb as a tool for sweeping inspection:

“And if you take a fine tooth comb, And rake down ‘all creation’, You couldn’t find a meaner man In this here mighty nation.”

By 1891 the picture is fully in place in The Century Magazine:

“I’ll go through this town like a fine-tooth comb but what I’ll find him.”

The familiar wording — going over or through something with a fine-tooth comb — grows from that same idea. The verb came after the noun. In August 1889, George Bernard Shaw wrote in The Star of a child a woman “benevolently clothed” and “fine-tooth-combed.” Grooming had become a way of talking about looking hard.

The Split That Still Causes Trouble

One later twist has caused more fuss than the meaning itself. Some people recut the words as fine toothcomb or just toothcomb, as if that were one object. Strict readers call it a slip, because the original idea is a comb with fine teeth, not a comb for teeth. The recut form still turned up in print in the 1890s and never quite went away. The argument is useful in one way. It shows how quickly an idiom can hide the picture that made it. Once the household comb fades from view, people start inventing a tool that was never there.

Why the Story Sticks

There is a quiet joke in the history. A comb tied to one of the least glamorous jobs in a household became the language of contracts, crime scenes, and account books. The same close teeth that pulled nits from a child’s hair now describe a page read line by line. English did not invent a new idea of being thorough. It borrowed a comb that already refused to let small things slip past.

Variants

• fine-toothed comb
• fine tooth comb
• go over something with a fine-tooth comb
• go through something with a fine-tooth comb
• toothcomb
• fine toothcomb

Fashion, Hair

Last update: September 11, 2026 12:16 AM